Occlusion is one of the most important parts of treatment of patients with complete dentures prosthesis. Many denture prosthesis fail if the occlusion is not planned or developed in harmony and therefore the concept of occlusion is universal. The concept of occlusion regarding design and fabrication of a prosthetic occlusion have let to fascinating controversies among occlusion. The Occlusion is bringing together or contacting of the mandibular and maxillary teeth and it is a dynamic concept. A firm understanding of occlusal relationships is essential for any phase of restorative dentistry. The importance of occlusion to the overall success or failure of treatment has been emphasized by prosthodontists.